I just bought one a few weeks ago from Doller Offshore (see my note below). I'm having it put in next week and then will know how it works. A few places I called around and asked about them said great guage.
It was $148.80 plus a few bucks shipping to CA. and they shipped it right away.
Digital Depth Sounder with Alarm THRU-HULL DEPTH SOUNDER GL-200THW WHITE
(E-mail response from Doller Offshore)
Thanks for the interest. YOur cost will be $148.80 Plus O/B Freight.
Let me know what you decide and if you need anything else.
Doller Offshore- Parts Dept- 954-463-9988 Ext 208